Find current pollution levels, graph recent air monitoring data, or download detailed ambient air monitoring data from the MassDEP statewide network of air monitoring stations.

Yearly summaries of data obtained from the MassDEP statewide air monitoring network.

Provides an overview of the MassDEP statewide network of air monitoring stations - including monitoring sites, parameters measured and rationale - and describes recent or planned changes.

Color-coded month-by-month reviews of daily peak 8-hour-averaged ozone concentrations at all Massachusetts state ozone monitors.

These reports periodically quantify Massachusetts emissions of criteria pollutants: ammonia, carbon monoxide, nitrogen oxides, ozone, particulate matter, sulfur dioxide and volatile organic compounds. 

Prepared in 2002, the inventory is used to help identify potential strategies for reducing diesel particulate matter emissions and for addressing their public health and environmental impacts.

Annual reports, newsletters and other publications documenting the activities and results of the state's motor vehicle safety inspection and emissions test program.

SIPs describe the various control measures being implemented to reduce emissions of specific pollutants in Massachusetts and document the state's progress in attaining national ambient air quality standards. 

Most waste-to-energy facilities in Massachusetts are required to submit periodic emissions reports to MassDEP and notify the agency when their emissions exceed applicable limits.  

Additional documents that provide the framework for, and summarize the results of, state efforts to reduce air pollution and minimize its environmental and public health effects in Massachusetts.